Home / 20,428.73-28,188.58-11,474.52

Finding the Fourth Proportional to 20,428.73, 28,188.58 and 11,474.52

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Solution

The fourth proportional to 20,428.73, 28,188.58 and 11,474.52 is: 15,833.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.73 : 28,188.58 = 11,474.52 : x
  2. Step 2: Convert to fraction form
    20,428.73/28,188.58 = 11,474.52/x
  3. Step 3: Cross multiply
    20,428.73x = 28,188.58 × 11,474.52
  4. Step 4: Simplify right side
    20,428.73x = 323,450,396.30
  5. Step 5: Solve for x
    x = 323,450,396.30/20,428.73
  6. Step 6: Final answer
    x = 15,833.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.